Malicious PDF — malware analysis report

Static analysis result for SHA-256 02262d298533f09b…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 06:17:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 678e8f54e277ede2d5ae06f65ba65367 SHA-1: 0c4523e6d04d74de6fa9a1adacd71bd48141089d SHA-256: 02262d298533f09bcfd22f24cc1294b332d0554d8b7a9beedadbdda09824033b
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users into clicking on what appear to be free game generators or hacks. The primary link directs to a known malicious redirector, and the document body is filled with a link farm pointing to other potentially malicious PDF files. The overall goal appears to be driving traffic to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/games-like-coin-master-for-free-game-hack In PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/mcpe_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-do-you-get-free-robux-on-xbox-one_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-a-group-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/minecraft-java-account-free_GM479516143.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-roblox-hack-no-human-verify-for-tablets_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-cheats-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/games-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elib.upiyptk.ac.id/opac/repository/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F86 22304 bytes
SHA-256: aa881751ae3ba81e8552e0d1021aba275f461f01f74197efe9b176fb65e2dd35
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 18428 bytes
SHA-256: 7b60c1294d997f04f61e5608f4fda5ea7312313d385ffeed54d843e5d07233f5

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